Agent skill

Matlab Analyze Spectrum

by matlab in matlab/matlab-agentic-toolkit

Analyze signal spectra in MATLAB using nonparametric and parametric estimators.

Custom licenceAuto-check passed

Install Matlab Analyze Spectrum

skills CLI
$ npx skills add matlab/matlab-agentic-toolkit --skill matlab-analyze-spectrum -a claude-code

Project install by default; add -g for ~/.claude/skills/.

GitHub CLI
$ gh skill install matlab/matlab-agentic-toolkit matlab-analyze-spectrum --agent claude-code

Project scope by default; add --scope user for a personal install. Needs GitHub CLI 2.90.0 or later (public preview).

Manual copy
$ git clone --depth 1 https://github.com/matlab/matlab-agentic-toolkit.git skills-src && mkdir -p .claude/skills && cp -r skills-src/skills-catalog/signal-processing/matlab-analyze-spectrum .claude/skills/matlab-analyze-spectrum && rm -rf skills-src

Use ~/.claude/skills/ instead of .claude/skills for a personal install. The folder must contain SKILL.md.

Claude Code skills documentation · loads skills from .claude/skills/

Facts

Skill name
matlab-analyze-spectrum
GitHub stars
1.1k
Token cost
~5.5k tokens
SKILL.md length
2,072 words
Files
14 (incl. references)
Skills in repo
151
Repo updated
First seen
Licence
Custom licence

At a glance

Analyze signal spectra in MATLAB using nonparametric and parametric estimators.

  • Works in 9 steps: Batch or streaming? -- Determine if data… → Preliminary analysis -- When user… → Pre-process -- Check for NaN/gaps (use… → …
  • Computing frequency content
  • SKILL.md covers When to Use, When NOT to Use, Workflow and Batch vs Streaming, plus 10 more sections
  • Instructions only: no scripts, shell commands, URLs or credentials in SKILL.md

What it does

Matlab Analyze Spectrum is an agent skill from matlab/matlab-agentic-toolkit. Analyze signal spectra in MATLAB using nonparametric and parametric estimators. Use when computing frequency content, PSD, power spectrum, spectral peaks, bandwidth, or streaming spectral analysis. Covers pspectrum, pwelch, periodogram, pmtm, pburg, pmusic, rootmusic, plomb, poctave, spectrumAnalyzer, dsp.SpectrumEstimator. TRIGGER: FFT, PSD, power spectrum, spectral analysis, frequency content, bandwidth measurement, spectral leakage, window selection, streaming spectrum, periodicity, resolve close frequencies…

Its SKILL.md is about 5.5k tokens, which your agent loads only when the skill is triggered. The skill folder holds 14 other files, including reference files (for example `manifest.yaml`, `references/estimator-comparison.md` and `references/manual-fft-psd.md`).

The repository describes itself as: The MATLAB Agentic Toolkit brings proven MATLAB capabilities to AI agents, making engineering and scientific workflows agent-ready.

When your agent uses it

  • Computing frequency content
  • Streaming spectral analysis

Example prompts

  • “/matlab-analyze-spectrum”

Workflow steps

9 steps, taken from the first numbered list in SKILL.md.

  1. Batch or streaming? -- Determine if data is already in workspace (batch) or arrives frame-by-frame (streaming). See below.
  2. Preliminary analysis -- When user provides data, run diagnostics to inform technique selection (see below)
  3. Pre-process -- Check for NaN/gaps (use plomb for non-uniform data). Apply detrend(x) only if DC/trend visibly distorts the spectrum
  4. Choose output type -- PSD, power spectrum, amplitude spectrum, or octave bands (see below)
  5. Choose estimator -- Use preliminary analysis results + Estimator Selection below
  6. Compute spectrum -- Use the chosen function with explicit Fs (if available)
  7. Visualize -- Plot with proper axis labels (Hz, dB or linear units)
  8. Extract metrics -- Use findpeaks, bandpower, obw, powerbw. See references/peak-detection.md
  9. Verify -- Parseval's theorem, known tone levels. See references/power-from-spectrum.md

What it can do on your machine

Read from SKILL.md and the folder at commit 69e71df. It shows what the files ask for, not the result of running them.

  • Tool permissions

    Pre-approves nothing: there is no allowed-tools line, so your agent's usual permission prompts apply.

    From allowed-tools in the SKILL.md frontmatter.

  • Runs code

    No scripts in the folder and no shell commands in SKILL.md (its code samples are matlab).

    From the folder's file list and the shell code blocks in SKILL.md.

  • Network

    No URLs in SKILL.md.

    From URLs in SKILL.md, links to its own repository left out.

  • Credentials

    Names no API keys, tokens, secrets or passwords.

    From names ending in _API_KEY, _TOKEN, _SECRET, _KEY or _PASSWORD in SKILL.md.

Context cost

Matlab Analyze Spectrum loads about 5.5k tokens when it runs, and up to ~24k if it reads all its reference files. Until then it costs about 157 tokens; SKILL.md has 2,072 words of instructions outside code blocks.

Always · name and description, kept in context so the agent knows when to use it
~157
When it runs · the whole SKILL.md, loaded when a task matches
~5.5k
With references · SKILL.md plus every file in references/, read only if the agent opens them
~24k

Estimates: characters ÷ 4, the usual rule of thumb; real counts depend on the model's tokenizer. Scripts and assets cost tokens only if the agent reads them.

Safety

Auto-check passed

The automated check found no risky patterns in SKILL.md.

Automated static check — not a guarantee. Review scripts before installing. It scans the text of SKILL.md for risky patterns (piping downloads into a shell, reading credential files, hidden Unicode, destructive commands); files beside SKILL.md are not scanned.

SKILL.md

Its licence (Custom licence) doesn't allow us to republish the file, so here is its outline and opening line. It has 2,072 words (~5,476 tokens).

“Compute, visualize, and extract measurements from signal spectra using Signal Processing Toolbox. Choose the right spectral estimator, avoid common FFT pitfalls, and use built-in measurement functions instead of reinventing them.”

— opening of SKILL.md by matlab, Custom licence
name
matlab-analyze-spectrum
license
https://www.mathworks.com/content/dam/mathworks/license/pmrl/license.md
metadata.author
MathWorks
metadata.version
1.0

Read the full SKILL.md on GitHub

Files

SKILL.md and 13 other files (references) in skills-catalog/signal-processing/matlab-analyze-spectrum of matlab/matlab-agentic-toolkit.

  • SKILL.md
  • manifest.yaml
  • references/estimator-comparison.md
  • references/manual-fft-psd.md
  • references/peak-detection.md
  • references/poctave-api.md
  • references/power-from-spectrum.md
  • references/preliminary-analysis.md
  • references/pspectrum-equivalence.md
  • references/spectral-measurements.md
  • references/spectral-windows.md
  • references/streaming-spectral-analysis.md
  • references/troubleshooting.md
  • references/units-and-db.md

Open the folder on GitHubat commit 69e71df

Compare with similar skills

Matlab Analyze Spectrum next to the 5 skills that share the most tags, products or categories with it. Stars are the repository's; “used in” counts other GitHub owners with a copy.

Matlab Analyze Spectrum compared with similar skills
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Matlab Analyze Spectrum this skillmatlab/matlab-agentic-toolkit1.1k—~5.5kAutomated safety check: PassCustom licence
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SignalsPostHog/posthog40k—~4.3kAutomated safety check: PassCustom licence
MatlabzLanqing/codex-claude-academic-skills4.7k8 repos~2.3kAutomated safety check: NotesGPL-3.0
Trader Signalruvnet/ruflo74k—~605Automated safety check: NotesMIT
Task Effort EstimatorDonchitos/Claude-Code-Game-Studios26k—~1.2kAutomated safety check: PassMIT

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Questions about Matlab Analyze Spectrum

What does Matlab Analyze Spectrum do?

Analyze signal spectra in MATLAB using nonparametric and parametric estimators. Matlab Analyze Spectrum is an agent skill from matlab/matlab-agentic-toolkit. Analyze signal spectra in MATLAB using nonparametric and parametric estimators.

When should I use Matlab Analyze Spectrum?

Matlab Analyze Spectrum fits situations like: computing frequency content; streaming spectral analysis.

How do I install Matlab Analyze Spectrum in Claude Code?

Run `npx skills add matlab/matlab-agentic-toolkit --skill matlab-analyze-spectrum -a claude-code`. Or copy the skill folder (skills-catalog/signal-processing/matlab-analyze-spectrum in matlab/matlab-agentic-toolkit) into .claude/skills/matlab-analyze-spectrum in your project. Claude Code loads it when a task matches its description.

How do I install Matlab Analyze Spectrum in Codex?

Run `npx skills add matlab/matlab-agentic-toolkit --skill matlab-analyze-spectrum -a codex`. Or copy the skill folder (skills-catalog/signal-processing/matlab-analyze-spectrum in matlab/matlab-agentic-toolkit) into .agents/skills/matlab-analyze-spectrum in your project. Codex loads it when a task matches its description.

Can I use Matlab Analyze Spectrum in Cursor, Gemini CLI or GitHub Copilot?

Cursor, Gemini CLI, GitHub Copilot and OpenCode also load SKILL.md folders. With the skills CLI, run `npx skills add matlab/matlab-agentic-toolkit --skill matlab-analyze-spectrum -a cursor` (or -a gemini-cli, github-copilot or opencode for the others). To copy it by hand, put the folder in .cursor/skills/matlab-analyze-spectrum, .gemini/skills/matlab-analyze-spectrum, .github/skills/matlab-analyze-spectrum and .opencode/skills/matlab-analyze-spectrum in your project.

What does Matlab Analyze Spectrum need to run?

SKILL.md names no scripts, command-line tools or credentials: Matlab Analyze Spectrum is instructions for the agent only.

Does Matlab Analyze Spectrum access the network?

SKILL.md contains no URLs. Any network use would come from the scripts or tools the agent runs. This is read from the text; nothing was executed.

Is Matlab Analyze Spectrum safe to install?

Our automated static check of SKILL.md found no risky patterns, such as piping downloads into a shell, reading credential files or hidden Unicode. It is not a guarantee. Review the folder before installing.

What licence does Matlab Analyze Spectrum use?

Matlab Analyze Spectrum has a licence file (the repository's licence) that doesn't match a standard licence. Read it on GitHub before reusing the skill.

How many tokens does Matlab Analyze Spectrum use?

About 5.5k tokens (SKILL.md is roughly 22k characters). Agents keep only the skill's name and description in context until a task matches; then they load SKILL.md in full. Its references folder adds about 19k tokens, read only when the agent opens those files.

What are the alternatives to Matlab Analyze Spectrum?

Skills that share tags, products or a category with Matlab Analyze Spectrum: Matlab (K-Dense-AI/scientific-agent-skills, 48k stars), Signals (PostHog/posthog, 40k stars), Matlab (zLanqing/codex-claude-academic-skills, 4.7k stars) and Trader Signal (ruvnet/ruflo, 74k stars). The comparison table on this page puts their stars, adoption, token cost, safety result and licence side by side.

Who maintains Matlab Analyze Spectrum?

matlab (a GitHub organization) maintains it in matlab/matlab-agentic-toolkit, which has 1,144 GitHub stars. The repository holds 151 skills in this directory. The repository was last updated on October 8, 2026.

Source: matlab/matlab-agentic-toolkit on GitHub. Facts on this page come from the repository at the commit we read; the author's words are quoted as theirs.